Trump and Macron share never-ending handshake at Paris parade

When they met in May, Donald Trump and Emmanuel Macron shook each other's hands so tightly their knuckles went white.

But the two presidents seemed to take their handshake to the next level at the Bastille Day parade in Paris.

By our counting, it went on for nearly 30 seconds - and seemed at times more like a tussle than a polite greeting. Even the first ladies got involved.